Top 10 TypeScript Best Practices Every Developer Should Follow

TypeScript, a superset of JavaScript, offers static typing, better tooling support, and improved maintainability. By following best practices, developers can write scalable and error-free applications.

In this article, we will explore the top 10 TypeScript best practices that will help you improve your code quality and maintainability.

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1. Use Type Annotations Effectively

Type annotations improve readability and maintainability and prevent runtime errors.

✅ Good Practice (Using Type Annotations)

function greet(name: string): string {
  return `Hello, ${name}!`;
}

let age: number = 30;

❌ Bad Practice (No Type Annotations)

function greet(name) {
  return `Hello, ${name}!`;
}

let age = "30"; // Unexpected type usage

🔹 Why?

• Prevents unexpected type errors.
• Enhances code documentation.

📌 Tip: Always define types explicitly for function parameters, return values, and variables.

2. Use any Type Sparingly